201028900 六、發明說明： 【發明所屬之技術領域】 本發明係有關於觸控面板(t〇uch panel)，尤指一種用 於觸控面板之觸碰感測裝置(t〇uch sensing device)及方法。 【先前技術】 近幾年來，觸控面板作為一種輸入裝置，已逐漸應用 至多種電子裝置中，如手機、個人數位助理(pDA)、平板 β 電腦⑽letPC)等等。在利用觸控面板進行輸入時，有多 種操作方式’以指示f;子裝置執行不_動作。例如，在 觸控面板上滑動代表移動(moving)，點一下代表按滑鼠的 左鍵’點兩下代表按滑鼠右鍵，點一下加上滑動代表拖复 (drag)…等等。然而’要使前述各種操作方式能順利運作， 必須精確偵測到觸控面板在各個時間點被觸碰的位置，才 能決定要執行何翻制的動作。例如，在_面板上滑 動時，可依據前後時間點所觸碰的位置，來判斷移動的方 ® 向及距離。 另外，由於觸控面板多應用於可攜式的電子裝置，因 此馳面板之耗電轉錢影響電子裝置效能的重要因 素。 【發明内容】 有鑑於此，本發明之一目的，在於提供-種觸碰感測 裝置及方法，以精確偵測觸控面板上被觸碰的位置。 本發明之另一目的，在於提供一種觸碰感測裝置及方 4 201028900 法’以達到省電的功效。 本發明揭露一種觸碰感測裝置，包含：一觸控面板， 具有複數條水平感應線及複數條垂直感應線，用以在對該 觸控面板進行一觸碰動作時，分別感應產生對應之複數個 水平感應訊號及複數個垂直感應訊號；一轉換單元，耦接 至該觸控面板，用以依據該些水平感應訊號及該些垂直感 應訊號’產生複數個二維感應訊號，其中每一二維感應訊 號係依據該些水平感應訊號其中之一與該些垂直感應訊 ❿ 號其中之一兩者之乘積而決定；以及一計算單元，耦接至 該轉換單元，用以依據該些二維感應訊號，計算出該觸碰 動作在該觸控面板上之觸碰位置。 本發明另揭露一種觸碰感測方法，包含：感應觸控面 板上之觸碰動作，以產生複數個水平感應訊號及複數個垂 直感應訊號’其中每一水平感應訊號對應一垂直座標，每 一垂直感應訊號對應水平座標；依據該些水平感應訊號 及該些垂直感應訊號，產生複數個二維感應訊號，其中每 © 一二維感應訊號係依據該些水平感應訊號其中之一與該 些垂直感應訊號其中之一兩者之乘積而決定；以及依據 該些二維感應訊號，決定該觸碰動作在該觸控面板上之觸 碰位置。 【實施方式】 第1圖係本發明之觸碰感測裝置之一實施例的方塊 圖，其中，觸碰感測裝置10包含一觸控面板11、一轉換 單元12及一計算單元13。觸控面板11具有複數條垂直 5 201028900 感應線及複數條水平感應線’每一垂直感應線對應一水平 座標，每一水平感應線對應一垂直座標，換言之，這些水 平感應線及垂直感應線交錯分布於觸控面板11上，形成 一個二維之座標系。當使用者對觸控面板U進行一觸碰 動作時，各條垂直感應線及水平感應線即分別進行感應， 以產生相對應之垂直感應訊號及水平感應訊號❶其中，垂 直感應訊號代表觸控面板11上對應水平座標所感應到的 觸碰強度’水平感應訊號則代表對應垂直座標所感應到的 ❹ 觸碰強度。轉換單元12耦接至觸控面板11，可將觸控面 板11所產生之垂直感應訊號及水平感應訊號兩兩相乘， 以產生複數個二維感應訊號，亦即，每個二維感應訊號代 表某一垂直感應訊號與某一水平感應訊號兩者之乘積。藉 此，轉換單元12可將原本一維之垂直感應訊號及水平感 應訊號，轉換為二維的感應訊號，而每個二維感應訊號即 代表觸控面板11上某一組水平座標與垂直座標的位置所 感應到觸碰強度。此外，藉由將垂直感應訊號及水平感應 G 訊號兩兩相乘，亦可使垂直感應訊號及水平感應訊號所包 含的雜訊變小，達到濾除雜訊的效果，使所得到的二維感 應訊號更能精確反映感應的結果。 計算單元13耦接至轉換單元12,可依據轉換單元12 所產生之二維感應訊號’計算出使用者之觸碰動作在觸控 面板11上之觸碰位置，其中，該觸碰位置之水平座標係 依據該些二維感應訊號及其所對應之水平座標而決定，而 該觸碰位置之垂直座標則依據該些二維感應訊號及其所 對應之垂直座標而決定。於此實施例中，該觸碰位置之水 6 201028900 平座標為每個二喊應賴及频韻之水平鋪之乘 積之和除以該些二維感應訊號之和所獲得之商，而該觸碰 位置之垂直座標為每個二轉應減及其所對應之垂直 座標之乘積之和除以該些二維感應訊號之和所獲得之 商’以計算精確之觸碰位置。計算單元13在計算出觸碰 位置之水平麟及垂直座標後，便將這些資訊傳給電子裝 置之微控制器(圖未顯示)，以解讀這些資訊代表的意義(如 移動或拖曳等等），據以執行對應的動作。 © 舉例而言，假設觸控面板u有三條垂直感應線及兩 條水平感應線，分別對應XI、X2、χ3之水平座標及γι、 Y2之垂直座標。再假設其所感應產生之垂直感應訊號及 水平感應訊號分別為al、a2、a3及bl、b2，則轉換單元 12可產生六個二維感應訊號al*bl、al*b2、a2*bl、a2*b2、 a3*bl及a3*b2。計算單元13所得之觸碰位置之水平座標 X與垂直座標Y分別為： X=(al*bl*Xl+al*b2*Xl+a2*bl*X2+a2*b2*X2+a3*bl*X3 +a3*b2*X3) φ /(al*bl+al*b2+a2*bl+a2*b2+a3*bl+a3*b2) 式⑴ Y=(al*bl*Yl+al*b2*Y2+a2*bl*Yl+a2*b2*Y2+a3*bl*Yl +a3*b2*Y2) /(al*bl+al*b2+a2*bl+a2*b2+a3*bl+a3*b2) 式(2) 於此實施例中，轉換單元12將每個水平感應訊號與 一水平臨界值作比較，只選取其中一部份的水平感應訊 號，例如選取大於水平臨界值者’排除未選取者。同樣地， 轉換單元12也將每個垂直感應訊號與一垂直臨界值作比 較，只選取其中一部份的垂直感應訊號’例如選取大於垂 201028900 直臨界值者，排除未選取者；轉換單元12依據所選取之 水平感應訊號與垂直感應訊號，來產生二維感應訊號。在 另一實施例中，計算單元13將每個二維感應訊號與二維 臨界值作比較，只選取其中一部份的二維感應訊號 ，例如 選取大於二維臨界值者，來進行該觸碰位置之計算，未選 取者則不列入考慮。剛述水平臨界值、垂直臨界值及二維 臨界值皆為經驗值’可用來過濾掉較小或不具代表性的感 應訊號，以簡化计算。在另一實施例中，轉換單元12分 ❹ 別依據水平臨界值與垂直臨界值來選取水平感應訊號與 垂直感應訊號，而计算單元13則依據二維臨界值來選取 二維感應訊號’以更大幅度地簡化計算。 於此實施例中，觸控面板11係一電容式觸控面板 (capacitive touch panel)14 ’ 如第 2A 圖所示。其中，電容 式觸控面板14具有Μ條垂直感應線及N條水平感應線 (第2A圖係以M=N=5為例）’分別對應至χι~χ5水平座 標及Υ1〜Υ5垂直座標。在電容式觸控面板14中，每條垂 ❹ 直感應線及水平感應線具有一等效電容，當使用者觸碰面 板14時，會造成這些等效電容值的改變，而垂直感應線 及水平感應線所感應產生之垂直感應訊號及水平感應訊 號，即代表等效電容值的改變量。垂直(或水平)感應線^ 等效電容值改變量越大，即代表其對應的水平(或垂直)座 標越接近觸碰位置。 第2Β圖係電容式觸控面板14内部之感應電路的示 意圖，其中，每一垂直感應線及水平感應線之等效電容皆 耦接至多工器25，由一控制訊號來切換，多工器乃之輸 201028900 出端輕接至一遲滯比較器(hysteresis comparator)26之輸入 端’遲滯比較器26之另一輸入端則轉接至一參考電壓源 Vref。當多工器25切換至某一等效電容時，開關23導通、 開關24不導通，使定電流源21對該等效電容充電，此時 該等效電容之電位低於遲滯比較器26之遲滞帶物如比咖 band)的上限，因此遲滯比較器26之輸出訊號為高電位。 當該等效電容充電至遲滯帶之上限時，遲滞比較器26之 輸出訊號即轉為低電位’並且開關24導通、開關23不導 ❹ 通，使該等效電容經由定電流源22放電。待該等效電容 放電至遲滯帶的下限時，遲滞比較器26之輸出訊號再恢 復為高電位。舉例而言，電容式觸控面板14可利用一較 快的時脈訊號及計數電路(圖未顯示)來計數該等效電容 充放電一次所經歷之時脈週期數；或者，該計數電路亦可 设定為計算該等效電容充放電複數次所經歷之時脈週期 數’以代表該等效電容所產生的觸控感應頻率。 當使用者觸碰電容式觸控面板14時，會使觸碰位置 ❿及其附近之垂直感應線與水平感應線之等效電容值變 大，造成等效電容之充放電時間變長，所經歷之時脈週期 數也變大。因此，可利用時脈週期數的改變量來代表等效 電容值的改變，亦即’垂直感應線與水平感應線所感應產 生之垂直感應訊號及水平感應訊號即代表時脈週期數的 改變量’作為後續轉換單元12產生二維感應訊號及計算 單元13計算觸碰位置之用。當電容式觸控面板14上有觸 碰動作時，經由多X器25快物換至每—垂直感應線與 每-水平感應線對應之等效電容，第2B圖之感應電路即 201028900 :刀別4算每-等效電容充放電—賴經歷之時脈週期 數。將所狀時脈週練減去未有觸碰動作時等效電容充 放電-次所經歷之時脈聊數’即為時脈週期數的改變 量。 由於轉換單元12可將-維感應訊號轉換為二維感應 訊號’電容式觸控面板14僅需切換至每個一維的等效電 容進行時脈週期數之計算(以第2A圖為例，僅需5+5=1〇 次的計算量），而不需就每個二維位置分別計算⑼5*片5 次的計算量由於執行時脈週期數之計算相當耗電，因 此上述實施例可以達到省電的效果。 第3圖係顯示在使用電容式觸控面板14時觸碰感 測裝置1G如何計算觸碰位置之實例。在觸碰動作進行 時，電容式觸控面板14利用如第2B圖所示之感應電路， 分別计舁對應於XI〜X5及Y1〜Y5之等效電容充放電一u 所經歷之時脈週期數。接著，將這些時脈週期數分別減去 未觸碰時之時脈週期數(假設料_，即為時脈週期數 之變化量’其中’對應於X1〜X5之時脈週期數變化量， 即為垂直感應訊號；對應於Y1〜Y5之時脈週期數變化 量，即為水平感應訊號。轉換單元12將任一對應於χι〜χ5 之時脈週期數變化量與任一對應於Υ1〜Υ5之時脈週期數 變化量兩兩相乘，得到25個二維乘積，即為二維感應訊 號。如前文所述’計算單元13可將每個二維感應訊號與 二維臨界值作比較，以排除某些較小的二維感應訊號，簡 少運算量並排除雜訊之影響。第3圖中，若二維臨界值為 2〇，則計算單元U選取(Χ2，Υ2)、（Χ2，Υ3)、阳抑)及 201028900 (Χ3，Υ2)所對應之二維乘積，依據前述式(1)與式(2)的方 式’來計算觸碰位置之水平座標X與垂直座標γ : X = (100*Χ2+50*Χ2+30*Χ2+30*Χ3) / (100+50+30+30) Y = (100*Y2+50*Y3+30*Y4+30*Y2) / (100+50+30+30) β月/主意，轉換單元12亦可依據上述實施例所揭露之 利用垂直或水平臨界值，排除某些較小之時脈週期數變化 量，即垂直或水平感應訊號，以簡化運算量並排除雜訊之 影響。 © 第4圖係本發明之觸碰感測方法之一較佳實施例的 流程圖，包含下列步驟：步驟40 :感應一觸控面板上之 觸碰動作，以產生複數個水平感應訊號及複數個垂直感應 訊號’其中母一水平感應訊號對應一垂直座標，每一垂直 感應訊號對應一水平座標。步驟41 :依據該些水平感應 訊號及該些垂直感應訊號，產生複數個二維感應訊號，其 中每個一維感應§凡號係依據該些水平感應訊號其中之一 與該些垂直感應訊號其中之一兩者之乘積而決定，較佳 ® 地’可比較該些水平感應訊號與一水平臨界值，以選取該 些水平感應訊號至少其中之一，來產生該些二維感應訊 號；亦可比較該些垂直感應訊號與一垂直臨界值，以選取 該些垂直感應訊號至少其中之一，來產生該些二維感應訊 號，以簡化運算量並排除雜訊之影響。步驟42 :依據該 些一維感應訊號’计算出該觸碰動作在該觸控面板上之觸 碰位置’觸碰位置之水平座標係為每個二維感應訊號及其 所對應之水平座標之乘積之和除以該些二維感應訊號之 和所獲得之商’觸碰位置之垂直座標係為每個二維感應訊 11 201028900 號，其所對應之垂直座標之乘積之和除以該些二維感應 :號之和所船于之商，較佳地’亦可先比較該些二維感應 訊號與一維臨界值，崎賴些二減應峨至少其中之 :’再進行觸樹立置之計算，以簡化運算量並排除雜訊之 影響。 綜上所述，本發明揭露一種觸碰感測裝置，包含：觸 控面板’具錢數條水平感絲及複絲垂錢應線，用 以在對觸控面板進行觸碰動作時，分別感應產生對應之複 © 數個水平感應訊號及複數個垂直感應訊號；轉換單元，轉 接至觸控面板’用以依據水平感應訊號及垂直感應訊號， 產生複數個二維感應訊號，其中每—二維感應訊號係依據 水平感應訊號其中之一與垂直感應訊號其中之一兩者之 乘積而決定；以及計算單元，耦接至轉換單元，用以依據 二維感應訊號’決定觸碰動作在觸控面板上之觸碰位置。 以上所述係利用較佳實施例詳細說明本發明，而非限 制本發明之範圍。凡熟知此類技藝人士皆能明瞭，可根據 &以上實施例之揭示而做出諸多可能變化，仍不脫離本發明 之精神和範圍。 【圖式簡單說明】 第1圖係本發明之觸碰感測裝置之一實施例的方塊 圖。 第2A圖係一電容式觸控面板之示意圖。 第2B圖係第2A圖之電容式觸控面板内部之感應電 路的示意圖。 12 201028900 第3圖係顯示在使用第2A圖之電容式觸控面板時， 第1圖之觸碰感測裝置如何計算觸碰位置之實例。 第4圖係本發明較佳實施例之觸碰感測方法流程圖。 【主要元件符號說明】 11 :觸控面板 13 :計算單元 23、24 :開關 26 :遲滯比較器 10 :觸碰感測裝置 12 :轉換單元 21、22 :定電流源 25 :多工器 40〜42 :觸碰感測方法之一較佳實施例的流程201028900 VI. Description of the Invention: [Technical Field] The present invention relates to a touch panel, in particular, a touch sensing device for a touch panel and method. [Prior Art] In recent years, as an input device, a touch panel has been gradually applied to various electronic devices such as a mobile phone, a personal digital assistant (pDA), a tablet beta computer (10) letPC, and the like. When input is made using the touch panel, there are a plurality of operation modes 'to indicate f; and the child device performs no action. For example, swipe on the touch panel to represent moving, click on the left button of the mouse, click twice to represent the right mouse button, click to add a slider to represent the drag... and so on. However, in order for the above various operation modes to operate smoothly, it is necessary to accurately detect the position at which the touch panel is touched at various points in time to determine the action to be performed. For example, when sliding on the _ panel, you can judge the direction and distance of the movement based on the position touched by the front and rear time points. In addition, since the touch panel is mostly applied to a portable electronic device, the power consumption of the portable panel affects the performance of the electronic device. SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a touch sensing device and method for accurately detecting a touched position on a touch panel. Another object of the present invention is to provide a touch sensing device and a method for achieving power saving. The present invention discloses a touch sensing device, comprising: a touch panel having a plurality of horizontal sensing lines and a plurality of vertical sensing lines for respectively sensing a corresponding touch when the touch panel is touched; a plurality of horizontal sensing signals and a plurality of vertical sensing signals; a conversion unit coupled to the touch panel for generating a plurality of two-dimensional sensing signals according to the horizontal sensing signals and the vertical sensing signals, each of which The two-dimensional sensing signal is determined based on a product of one of the horizontal sensing signals and one of the vertical sensing signals; and a computing unit coupled to the conversion unit for determining the two The dimension sensing signal calculates the touch position of the touch action on the touch panel. The present invention further discloses a touch sensing method, comprising: sensing a touch action on the touch panel to generate a plurality of horizontal sensing signals and a plurality of vertical sensing signals, wherein each horizontal sensing signal corresponds to a vertical coordinate, and each of the horizontal sensing signals corresponds to a vertical coordinate. The vertical sensing signal corresponds to the horizontal coordinate; the plurality of two-dimensional sensing signals are generated according to the horizontal sensing signals and the vertical sensing signals, wherein each of the two-dimensional sensing signals is perpendicular to the horizontal sensing signals according to one of the horizontal sensing signals Determining the product of one of the sensing signals; and determining the touch position of the touch action on the touch panel according to the two-dimensional sensing signals. [Embodiment] FIG. 1 is a block diagram of an embodiment of a touch sensing device of the present invention, wherein the touch sensing device 10 includes a touch panel 11, a conversion unit 12, and a calculation unit 13. The touch panel 11 has a plurality of vertical 5 201028900 sensing lines and a plurality of horizontal sensing lines. Each vertical sensing line corresponds to a horizontal coordinate. Each horizontal sensing line corresponds to a vertical coordinate. In other words, the horizontal sensing lines and the vertical sensing lines are interlaced. Distributed on the touch panel 11 to form a two-dimensional coordinate system. When the user touches the touch panel U, the vertical sensing lines and the horizontal sensing lines are separately sensed to generate corresponding vertical sensing signals and horizontal sensing signals, wherein the vertical sensing signals represent touches. The touch intensity sensed by the horizontal coordinate on the panel 11 represents the 触 touch intensity sensed by the corresponding vertical coordinate. The conversion unit 12 is coupled to the touch panel 11 to multiply the vertical sensing signal and the horizontal sensing signal generated by the touch panel 11 to generate a plurality of two-dimensional sensing signals, that is, each two-dimensional sensing signal. Represents the product of a vertical inductive signal and a level of inductive signal. Thereby, the conversion unit 12 can convert the original one-dimensional vertical sensing signal and the horizontal sensing signal into two-dimensional sensing signals, and each two-dimensional sensing signal represents a certain set of horizontal coordinates and vertical coordinates on the touch panel 11. The position is sensed by the touch intensity. In addition, by multiplying the vertical sensing signal and the horizontal sensing G signal by two or two, the noise contained in the vertical sensing signal and the horizontal sensing signal can be made smaller, and the effect of filtering noise can be achieved, so that the obtained two-dimensional image is obtained. The inductive signal more accurately reflects the result of the induction. The calculation unit 13 is coupled to the conversion unit 12, and can calculate the touch position of the touch action of the user on the touch panel 11 according to the two-dimensional sensing signal generated by the conversion unit 12, wherein the level of the touch position is The coordinates are determined according to the two-dimensional sensing signals and their corresponding horizontal coordinates, and the vertical coordinates of the touch position are determined according to the two-dimensional sensing signals and their corresponding vertical coordinates. In this embodiment, the water position of the touch position 6 201028900 is the quotient of the sum of the product of the level of each of the two shouting frequencies and the frequency of the frequency, and the quotient obtained by the sum of the two-dimensional inductive signals. The vertical coordinate of the touch position is the sum of the products of the two rotations minus their corresponding vertical coordinates divided by the sum of the two-dimensional sensing signals to calculate the precise touch position. After calculating the horizontal and vertical coordinates of the touch position, the computing unit 13 transmits the information to the microcontroller of the electronic device (not shown) to interpret the meaning of the information (such as moving or dragging, etc.) According to the corresponding action. © For example, suppose the touch panel u has three vertical sensing lines and two horizontal sensing lines, corresponding to the horizontal coordinates of XI, X2, and χ3, and the vertical coordinates of γι and Y2. Assuming that the vertical sensing signals and the horizontal sensing signals induced by the signals are al, a2, a3, and bl, b2, respectively, the converting unit 12 can generate six two-dimensional sensing signals al*bl, al*b2, a2*bl, A2*b2, a3*bl, and a3*b2. The horizontal coordinate X and the vertical coordinate Y of the touch position obtained by the calculating unit 13 are respectively: X=(al*bl*Xl+al*b2*Xl+a2*bl*X2+a2*b2*X2+a3*bl* X3 +a3*b2*X3) φ /(al*bl+al*b2+a2*bl+a2*b2+a3*bl+a3*b2) Formula (1) Y=(al*bl*Yl+al*b2* Y2+a2*bl*Yl+a2*b2*Y2+a3*bl*Yl +a3*b2*Y2) /(al*bl+al*b2+a2*bl+a2*b2+a3*bl+a3* B2) Equation (2) In this embodiment, the conversion unit 12 compares each horizontal sensing signal with a horizontal threshold value, and selects only a part of the horizontal sensing signals, for example, selecting a value greater than the horizontal threshold value Selector. Similarly, the converting unit 12 compares each vertical sensing signal with a vertical threshold value, and selects only a part of the vertical sensing signals 'for example, selecting a vertical threshold greater than 201028900 to exclude unselected ones; and converting unit 12 The two-dimensional sensing signal is generated according to the selected horizontal sensing signal and the vertical sensing signal. In another embodiment, the computing unit 13 compares each two-dimensional sensing signal with a two-dimensional threshold, and selects only a part of the two-dimensional sensing signal, for example, selecting a value greater than two-dimensional threshold to perform the touch. The calculation of the touch position is not considered if it is not selected. Just as the horizontal threshold, the vertical threshold and the two-dimensional threshold are empirical values' can be used to filter out small or unrepresentative sensing signals to simplify the calculation. In another embodiment, the converting unit 12 selects the horizontal sensing signal and the vertical sensing signal according to the horizontal threshold and the vertical threshold, and the calculating unit 13 selects the two-dimensional sensing signal according to the two-dimensional threshold. Significantly simplify calculations. In this embodiment, the touch panel 11 is a capacitive touch panel 14' as shown in FIG. 2A. The capacitive touch panel 14 has a vertical sensing line and N horizontal sensing lines (the second drawing is M=N=5 as an example) corresponding to the horizontal coordinates of χι~χ5 and the vertical coordinates of Υ1~Υ5, respectively. In the capacitive touch panel 14, each of the vertical and horizontal sensing lines has an equivalent capacitance. When the user touches the panel 14, the equivalent capacitance value is changed, and the vertical sensing line and The vertical sensing signal and the horizontal sensing signal induced by the horizontal sensing line represent the amount of change in the equivalent capacitance value. Vertical (or horizontal) sensing line ^ The greater the amount of change in the equivalent capacitance value, the closer the corresponding horizontal (or vertical) coordinate is to the touch position. The second diagram is a schematic diagram of the sensing circuit inside the capacitive touch panel 14 , wherein the equivalent capacitance of each of the vertical sensing line and the horizontal sensing line is coupled to the multiplexer 25, and is switched by a control signal, and the multiplexer The input of the 201028900 is lightly connected to the input of the hysteresis comparator 26, and the other input of the hysteresis comparator 26 is switched to a reference voltage source Vref. When the multiplexer 25 switches to a certain equivalent capacitance, the switch 23 is turned on, and the switch 24 is not turned on, so that the constant current source 21 charges the equivalent capacitor, and the potential of the equivalent capacitor is lower than the hysteresis comparator 26 The hysteresis band is the upper limit of the band, so the output signal of the hysteresis comparator 26 is high. When the equivalent capacitor is charged to the upper limit of the hysteresis band, the output signal of the hysteresis comparator 26 is turned to a low potential 'and the switch 24 is turned on, and the switch 23 is not turned on, so that the equivalent capacitor is discharged through the constant current source 22 . When the equivalent capacitance is discharged to the lower limit of the hysteresis band, the output signal of the hysteresis comparator 26 is restored to a high level. For example, the capacitive touch panel 14 can use a faster clock signal and a counting circuit (not shown) to count the number of clock cycles experienced by the equivalent capacitor during charging and discharging; or, the counting circuit also It can be set to calculate the number of clock cycles experienced by the equivalent capacitor charging and discharging plural times to represent the touch sensing frequency generated by the equivalent capacitance. When the user touches the capacitive touch panel 14, the equivalent capacitance value of the vertical sensing line and the horizontal sensing line in the touch position ❿ and its vicinity becomes larger, and the charging and discharging time of the equivalent capacitance becomes longer. The number of clock cycles experienced has also increased. Therefore, the amount of change in the number of clock cycles can be used to represent the change in the equivalent capacitance value, that is, the vertical sensing signal and the horizontal sensing signal induced by the vertical sensing line and the horizontal sensing line represent the amount of change in the number of clock cycles. The second conversion signal is generated as the subsequent conversion unit 12 and the calculation unit 13 calculates the touch position. When there is a touch action on the capacitive touch panel 14, the equivalent capacitance corresponding to each vertical sense line and each horizontal sense line is changed via the multi-X device 25, and the sensing circuit of FIG. 2B is 201028900: the knife Do not calculate the number of cycles of each-equivalent capacitor charge-discharge. The number of clock cycles experienced by the equivalent capacitor charging/discharging when the non-touching action is subtracted from the clock pulse is the amount of change in the number of clock cycles. Since the conversion unit 12 can convert the -dimensional sensing signal into a two-dimensional sensing signal, the capacitive touch panel 14 only needs to switch to each one-dimensional equivalent capacitance to calculate the number of clock cycles (take FIG. 2A as an example, It only needs 5+5=1〇 calculations), and it is not necessary to calculate (9) 5* slices 5 times for each two-dimensional position. Since the calculation of the number of execution clock cycles is quite power-consuming, the above embodiment can To achieve the effect of power saving. Fig. 3 shows an example of how the touch sensing device 1G calculates the touch position when the capacitive touch panel 14 is used. When the touch operation is performed, the capacitive touch panel 14 uses the sensing circuit as shown in FIG. 2B to calculate the clock cycle experienced by charging and discharging the equivalent capacitance corresponding to XI~X5 and Y1~Y5, respectively. number. Then, the number of these clock cycles is respectively subtracted from the number of clock cycles when not touched (assuming that the material_ is the amount of change in the number of clock cycles 'where 'corresponds to the amount of change in the number of clock cycles of X1 to X5, That is, the vertical sensing signal; the amount of change in the number of clock cycles corresponding to Y1 to Y5 is the horizontal sensing signal. The converting unit 12 corresponds any one of the number of clock cycles corresponding to χι to χ5 to Υ1~ The variation of the number of clock cycles of Υ5 is multiplied by two to obtain 25 two-dimensional products, which are two-dimensional inductive signals. As described above, the calculation unit 13 can compare each two-dimensional inductive signal with a two-dimensional threshold. To exclude some small two-dimensional inductive signals, to reduce the amount of computation and to eliminate the influence of noise. In Figure 3, if the two-dimensional threshold is 2〇, the calculation unit U selects (Χ2,Υ2), ( Χ2, Υ3), Yang suppression) and the two-dimensional product corresponding to 201028900 (Χ3, Υ2), calculate the horizontal coordinate X and the vertical coordinate γ of the touch position according to the above equations (1) and (2): X = (100*Χ2+50*Χ2+30*Χ2+30*Χ3) / (100+50+30+30) Y = (100*Y2+50*Y3+30*Y4+30*Y2) / ( 100+5 0+30+30) β月/Idea, the conversion unit 12 may also exclude certain small clock cycle number changes, that is, vertical or horizontal sensing signals, according to the vertical or horizontal threshold values disclosed in the above embodiments. To simplify the calculation and eliminate the effects of noise. 4 is a flow chart of a preferred embodiment of the touch sensing method of the present invention, comprising the following steps: Step 40: sensing a touch action on a touch panel to generate a plurality of horizontal sensing signals and plural The vertical sensing signal 'the mother-level horizontal sensing signal corresponds to a vertical coordinate, and each vertical sensing signal corresponds to a horizontal coordinate. Step 41: generating a plurality of two-dimensional sensing signals according to the horizontal sensing signals and the vertical sensing signals, wherein each one-dimensional sensing is based on one of the horizontal sensing signals and the vertical sensing signals. Depending on the product of the two, it is preferable to compare the horizontal sensing signals with a horizontal threshold to select at least one of the horizontal sensing signals to generate the two-dimensional sensing signals; Comparing the vertical sensing signals with a vertical threshold to select at least one of the vertical sensing signals to generate the two-dimensional sensing signals to simplify the calculation and eliminate the influence of noise. Step 42: Calculate the touch position of the touch action on the touch panel according to the one-dimensional sensing signal 'the horizontal coordinate system of the touch position is each two-dimensional sensing signal and its corresponding horizontal coordinate The sum of the products divided by the sum of the two-dimensional inductive signals is the vertical coordinate of the contact position of each of the two-dimensional inductive signals 11 201028900, and the sum of the products of the corresponding vertical coordinates is divided by the sum. Two-dimensional induction: the quotient of the ship of the sum, preferably 'can also compare the two-dimensional inductive signals with the one-dimensional threshold, and the second one should be at least one of them: 'and then touch the tree The calculation is to simplify the calculation and eliminate the influence of noise. In summary, the present invention discloses a touch sensing device, which comprises: a touch panel having a plurality of horizontal sense wires and a multi-wire hanging money line for respectively performing a touch action on the touch panel. The sensing generates a plurality of horizontal sensing signals and a plurality of vertical sensing signals; the converting unit is transferred to the touch panel to generate a plurality of two-dimensional sensing signals according to the horizontal sensing signals and the vertical sensing signals, wherein each of the plurality of two-dimensional sensing signals is generated. The two-dimensional sensing signal is determined by the product of one of the horizontal sensing signals and one of the vertical sensing signals; and the computing unit is coupled to the conversion unit for determining the touch action according to the two-dimensional sensing signal Touch position on the control panel. The above description of the present invention is intended to be illustrative of the preferred embodiments of the invention. It will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of a touch sensing device of the present invention. Figure 2A is a schematic diagram of a capacitive touch panel. Figure 2B is a schematic diagram of the inductive circuit inside the capacitive touch panel of Figure 2A. 12 201028900 Figure 3 shows an example of how the touch sensing device of Figure 1 calculates the touch position when using the capacitive touch panel of Figure 2A. Figure 4 is a flow chart of a touch sensing method in accordance with a preferred embodiment of the present invention. [Description of main component symbols] 11 : Touch panel 13 : Calculation unit 23 , 24 : Switch 26 : Hysteresis comparator 10 : Touch sensing device 12 : Conversion unit 21 , 22 : Constant current source 25 : Multiplexer 40 ~ 42: Flow of one of the preferred embodiments of the touch sensing method
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